A method for constructing an optical flow field includes classifying a plurality of scenarios according to motions of a mobile platform carrying an imaging device and statuses of the imaging device. The plurality of scenarios include at least one of elementary scenarios or combined scenarios. The method further includes constructing a plurality of optical flow fields each corresponding to one of the plurality of scenarios, acquiring a motion of the mobile platform and a status of the imaging device relative to the mobile platform, and selecting a corresponding optical flow field from the constructed optical flow fields corresponding to the plurality of scenarios based upon the motion of the mobile platform and the status of the imaging device for the imaging device to capture a frame at a shooting direction.